Checker searches for incomplete reaction map. A reaction with two or less atom maps (both on the reactant and the product side) is considered an incompletely mapped reaction.
Fixer offers mapping the reaction (mapreaction).
Example :
| Reaction Map Error Checker ( reactionmap) | Warning: | Fix | 
|---|---|---|
| Mapping ( mapreaction) | ||
| Find incomplete reaction map |  ex_reactionmap_ch |  ex_reactionmap_f |